n, x, y = map(int, input().split())
z = x + y
C = [0] * z
ans = 0
for i in range(n):
    p, c = input().split()
    p = int(p)
    if c == "A":
        ans += p
        C[i % z] -= p
    else:
        C[i % z] += p

C.sort(reverse=True)
ans += sum(C[:y])
print(ans)